Quote:
Originally Posted by JFP in PA
The fact that the codes you are seeing is an impossibility (overly lean and rich at the same time) says something is wrong. Most likely problem is that you inadvertently "upgraded" to the later MAF (part number ending in 125 01 or higher) when you replaced the original MAF, which REQUIRES the DME be recoded in order for it to work properly, which requires access to a PIWIS system.
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Right, that puzzled me as well, but with my original MAF I also got those 4 codes, so I will put the original MAF back and replace the vacuum reservoir which is bad then reset ECU and test drive the car to see if codes comes back again.
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